Spinterface between fullerene C60 and La0 7Sr0 3MnO3 (LSMO) was studied by means of density functional theory. Co-existence of many different configurations was shown, and probabilities of their appearance were estimated. Dependence of composite properties on configuration and temperature was also investigated. Key role of transition metal atoms in both binding between composite compartments and magnetic ordering in C60 molecule was discussed. The latter was suggested to be responsible for spin-polarized charge transport while overall magnetic moment of fullerene molecule is relatively small. Display omitted •Spinterface between fullerene C60 and LSMO was studied by means of density functional theory.•Transition metal atoms play the key role in composite formation.•Co-existence of many different configurations was shown.•The mechanism of spin-polarized charge transport was discussed.